Area Code 428 – Dundalk
The phone area code for Dundalk is 428 (international format +353428). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 428
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Dundalk
Geographic Coverage and Administrative Jurisdiction
The +353 428 area code is a geographic National Destination Code (NDC) assigned to the town of Dundalk and its surrounding areas in County Louth, Ireland. This code serves the northern part of the Republic of Ireland, close to the border with Northern Ireland. The administrative jurisdiction covers Dundalk Urban District and extends to nearby towns and villages such as Blackrock, Carlingford, and Omeath. The area is part of the Leinster province and is a significant economic hub in the region.
Dialing Formats and Caller Instructions
For local callers within Ireland, the number is dialed as 042 428 XXXX (where XXXX is the local subscriber number). Note that the trunk prefix '0' is used for domestic calls. For international callers, the number must be dialed in the E.164 format: +353 42 428 XXXX (or +353428XXXXX when the subscriber number is combined). The area code '428' is part of the larger Dundalk exchange area, which uses the '042' trunk code. The '428' prefix is a central office code within this exchange, serving specific local exchanges.
Overlay and Numbering Considerations
Currently, there is no overlay code for the Dundalk area. The '042' trunk code is unique to the region, and the '428' prefix is one of several central office codes within it. Subscriber numbers are typically 5 to 7 digits long, and the total length of a national significant number (NSN) is 9 digits (including the leading '0' but excluding the country code). The numbering plan follows the ITU-T E.164 recommendation, ensuring global interoperability.
Caller Instructions for Local and Foreign Callers
For local callers within Dundalk, it is possible to dial the subscriber number directly without the area code if the call is within the same local exchange area. However, for calls from other parts of Ireland, the full national format (042 428 XXXX) is required. Foreign callers must replace the leading '0' with the country code +353 and drop the trunk prefix, resulting in +353 42 428 XXXX. This ensures proper routing through the international gateway.
Practical Examples
- Local call (within Dundalk): 428 XXXX
- National call (from Dublin): 042 428 XXXX
- International call (from UK): +353 42 428 XXXX
Understanding these formats is essential for businesses and individuals communicating with Dundalk-based contacts. The area code is part of Ireland's geographic numbering plan, which is administered by ComReg, the national regulatory authority.